Question

1 + 3 + 3 square + dash dash dash + 3 ki power n minus 1 is equal to 3 ki power n minus 1 / 2

Answer 1

answer is -2.16

i hope it will help u

Answer 2

(1+3+3)^2+____+3^n-1=3^n-1/2
7^2+____=-1/2+1
49+___=1/2
___=1/2-49
___=-97/2

-48.5